Analysis of the Niche Space of Picea crassifolia on the Northern Slope of Qilian Mountains

  • 1.Key Laboratory of Arid and Grassland Agroecology of Ministry of Education; Lanzhou University; Lanzhou 730000; China; 
    2.Key Laboratory of Western China’s Environmental Systems; Lanzhou University; Lanzhou 730000; China

Received date: 2009-04-19

  Revised date: 2009-09-16

  Online published: 2010-01-25

Supported by

Nation Natural Science Foundation of China, No.30770387; No.40671067; National Environmental Protection Commonweal Project of China (NEPCP), No.200809098


The distribution of Picea crassifolia is affected by environmental conditions.Quantifying evaluation of the relationship between the distribution of Picea crassifolia and its habitat is significant for managing and restoring the damaged forest ecosystem,but there has been a lack of effective methods for quantitative evaluation.The northern slope of Qilian Mountains in Northwest China was selected as the study area and Picea crassifolia,the dominant species in the study area,was the core of the study.Based on digital elevation model(DEM) and inventory data of Picea crassifolia distribution,the niche space of Picea crassifolia has quantitatively been defined by the spatial analysis of geographic information system.Results show that the borders of the niche space are delineated by border functions.Generally,the niche space is July mean temperature:8.5 oC < TJuly < 14 oC,and the annual precipitation is 300 mm < Pannual < 620 mm.The range of elevation of the forest is from 2576 to 3344 m and its aspect is NNW and NNE.The range of slope of the forest is from 6o to 39o.The relationship between the slope and distribution frequency of Picea crassifolia is fit for Gauss function.

Cite this article

ZHAO Chuanyan1; BIE Qiang2; PENG Huanhua2 . Analysis of the Niche Space of Picea crassifolia on the Northern Slope of Qilian Mountains[J]. Acta Geographica Sinica, 2010 , 65(1) : 113 -121 . DOI: 10.11821/xb201001012


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